<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图 -->
        <el-card>
            <!-- 添加角色按钮 -->
            <el-row>
                <el-col>
                    <el-button type="primary">添加角色</el-button>
                </el-col>
            </el-row>
            <!-- 角色列表区域 -->
            <el-table :data="RolesList" border stripe>
                <!-- 展开列 -->
                <el-table-column type="expand">
                    <template slot-scope="scope">

                        <el-row :class="['bdbottom', i1===0? 'bdtop': '','vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
                            <!-- 渲染一级权限 -->
                            <el-col span="5">
                                <el-tag  closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!-- 渲染二和三级权限 -->
                            <el-col span="19">
                                <!-- 通过for循环 嵌套渲染二级权限 -->
                                <el-row :class="[i2===0 ? '': 'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                                    <el-col :span="6">
                                        <el-tag type="success"  closable @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <el-col :span="18">
                                        <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row, item3.id)">{{item3.authName}}</el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>
                        <!-- <pre>
                             {{scope.row}}
                        </pre> -->
                        <!-- <pre>
                             {{scope.row}}
                        </pre> -->
                       

                    </template>
                </el-table-column>
                <!-- 索引列 -->
                <el-table-column type="index"></el-table-column>
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
                <el-table-column label="操作" width="300px">
                    <template slot-scope="scope">
                        <el-button type="primary" icon="el-icon-edit"
                        size="mini">编辑</el-button>
                        <el-button type="danger" icon="el-icon-delete"
                        size="mini">删除</el-button>
                        <el-button type="warning" icon="el-icon-setting"
                        size="mini" @click="showSetRightsDialog(scope.row)">分配权限</el-button>
                    </template>
                </el-table-column>
            </el-table>
            <!-- 分配权限的对话框 -->
            <el-dialog
                title="分配权限"
                :visible.sync="setRightDialogVisible"
                width="50%"
                @close="setRightDialogClosed"
                >
                <!-- 树形控件 -->
                <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
                <span slot="footer" class="dialog-footer">
                    <el-button @click="setRightDialogVisible = false">取 消</el-button>
                    <el-button type="primary" @click="allotRights">确 定</el-button>
                </span>
            </el-dialog>
        </el-card>
    </div>
</template>

<script>
export default {
    data(){
        return {
            // 所有角色列表
            RolesList: [],
            // 控制权限对话框
            setRightDialogVisible: false,
            rightsList: [],
            // 树形控件的属性绑定对象
            treeProps: {
                label: 'authName',
                children: 'children'
            },
            // 默认选中的节点id数组
            defKeys: [],
            roleId: ''
        }
    },
    created(){
        this.getRolesList();
    },
    methods: {
        async getRolesList(){
            const {data: res} = await this.$http.get('roles')
            if(res.meta.status !== 200){
                return this.$message.error("获取角色列表失败")
            }else{
                this.RolesList = res.data;
                console.log(this.RolesList)
            }
        },
        // 根据id删除对应权限
        removeRightById(role, rightsId){
            // 弹框提示
            this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).then(async() => {
                const {data: res} = await this.$http.delete(`roles/${role.id}/rights/${rightsId}`);
                if(res.meta.status !== 200){
                    return this.$message.error('删除权限失败！')
                }else{
                    this.$message({
                    type: 'success',
                    message: '删除成功!'
                });
                // this.getRolesList()
                role.children = res.data
            }
                
            }).catch(() => {
                this.$message({
                    type: 'info',
                    message: '已取消删除'
                });          
            });
            
        },
        async showSetRightsDialog(role){
            this.roleId = role.id
            // 获取权限数据
            const {data:res} = await this.$http.get('rights/tree')
            if(res.meta.status !== 200){
                return this.$message.error("获取权限数据失败！")
            }else{
                // 把获取到的权限数据保存到data中
                this.rightsList = res.data
                // console.log(this.rightsList)
            }
            // 递归获取三级节点的id
            this.getLeafKeys(role, this.defKeys)
            this.setRightDialogVisible = true
        },
        // 通过递归的形式，获取角色下所有三级权限的id，并保存到defKeys数组中
        getLeafKeys(node, arr){
            // 如果当前node节点不包含children属性，则是三级节点
            if(!node.children){
                return arr.push(node.id)
            }
            node.children.forEach(element => {
                this.getLeafKeys(element, arr)
            });
        },
        // 监听分配权限对话框的关闭事件
        setRightDialogClosed(){
            this.defKeys = []
        },
        // 确定点击为角色分配权限
        async allotRights(){
            const keys = [
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()
            ]
            // console.log(keys)
            // 将数组改为逗号拼接的字符串
            const idStr = keys.join(',')
            // console.log(idStr)
            const {data:res} = await this.$http.post(`roles/${this.roleId}}/rights`, {rids: idStr})
            if(res.meta.status !==200){
                this.$message.error("修改用户权限失败")
            }else{
                this.$message.success("修改用户权限成功")
            }
            this.getRolesList()
            this.setRightDialogVisible = false
        }
    }
}
</script>

<style scoped>
.el-tag {
    margin: 7px;
}
.bdtop {
    border-top: 1px solid #eee;
}
.bdbottom {
    border-top: 1px solid #eee;
}
.vcenter {
    display: flex;
    align-items: center;
}
</style>